US4623193A - Seat with lumbar support - Google Patents

Seat with lumbar support Download PDF

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Publication number
US4623193A
US4623193A US06/584,108 US58410884A US4623193A US 4623193 A US4623193 A US 4623193A US 58410884 A US58410884 A US 58410884A US 4623193 A US4623193 A US 4623193A
Authority
US
United States
Prior art keywords
back rest
frame
strap
slide member
relative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/584,108
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English (en)
Inventor
Reiner Lieker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PA RENTROP HUBBERT & WAGNER FAHRZEUGAUSSTATTUNGEN & CO KG A CORP OF GERMANY GmbH
PA Rentrop Hubert and Wagner Fahrzeugausstattungen and Co GmbH
Original Assignee
PA Rentrop Hubert and Wagner Fahrzeugausstattungen and Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PA Rentrop Hubert and Wagner Fahrzeugausstattungen and Co GmbH filed Critical PA Rentrop Hubert and Wagner Fahrzeugausstattungen and Co GmbH
Assigned to P.A. RENTROP HUBBERT & WAGNER FAHRZEUGAUSSTATTUNGEN GMBH & CO KG, A CORP OF GERMANY reassignment P.A. RENTROP HUBBERT & WAGNER FAHRZEUGAUSSTATTUNGEN GMBH & CO KG, A CORP OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LIEKER, REINER
Application granted granted Critical
Publication of US4623193A publication Critical patent/US4623193A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B60N2/667—Lumbar supports having flexible support member bowed by applied forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B60N2/666—Lumbar supports vertically adjustable

Definitions

  • the present invention relates to seats with lumbar or lordotic supports provided to press against the undersprings of the back rest of the seat. Such seats are particularly, but no exclusively, suitable for use as vehicle seats.
  • the object of the invention is to improve a seat of this type in such a manner that the lumbar or lordotic support is effective over the entire width of the back rest and that it is adjustable to the individual needs of the user.
  • the present invention provides a seat including a seat portion area, a back rest connected to the seat portion and having underspringing, a lumbar support adapted to be pressed against the underspringing of said back rest, said lumbar support including a pressure strap extending across the width of the back rest, and a carrying frame for said strap, which frame is infinitely variably pivotably mounted to the back rest.
  • FIG. 1 is a partial view of the back rest of a motor vehicle seat with the padding omitted for clarity;
  • FIG. 2 is a section on an enlarged scale along line II--II in FIG. 1.
  • FIG. 1 of the drawings shows the underspringing of a seat back rest.
  • the underspringing consists of wires 1 disposed at a distance from one another, and crosswires 2 disposed at a distance from one another.
  • the wires 1 and 2 are encased in paper.
  • the network formed by the wires 1,2 is anchored to a frame of the back rest with the interposition of elastic elements, e.g. spiral springs or the like.
  • References 3,4 denote the two side spars of the back rest frame which are joined together in the lower portion by means of a cross-bar 5.
  • Reference 6 denotes a lumbar support which can be pressed in infinitely variable manner against the underspringing 1,2.
  • This support is in the form of a pressure strap which extends between the two side spars 3,4 of the back rest frame.
  • the lumbar support 6 is connected with a carrying frame which is infinitely variably pivotably mounted to the back rest frame.
  • This latter support is constructed as a U-shaped harness with two upstanding legs 6,7 and a cross-bar 8.
  • Bearings 9 provide an articulated connection of the U-shaped harness with the back rest frame.
  • the bearings 9 support the harness cross-bar 8 and are firmly connected with the back rest frame cross-bar 5.
  • each holder 10,11 for the lumbar support 6 are slidably mounted.
  • each holder 10,11 is connected with an end of the lumbar support by means of elastic elements, e.g. tension springs 12,13.
  • Infinitely variable pivoting of the support is effected by means of an eccentric drive.
  • a shaft 15 is mounted in the side spar 4 of the back rest.
  • the shaft 15 can be operated by means of a handle 14.
  • an eccentric 16, of an eccentric drive is fixed.
  • the working surface 16a of the eccentric 16 engages against an abutment 17 firmly connected with one leg 7 of the support (FIG. 2).
  • each holder 10,11 a pin 18,19 is provided on each holder 10,11 .
  • the pin engages in a slot 20a or 21a of a slide member 20 or 21.
  • These two slide members 20,21 are mounted so as to be raised and lowered along the associated side spars 3 and 4 of the back rest, by means of an adjustable drive.
  • the slide member 21 is in this arrangement disposed in a respective guide rail 4a which is mounted on the side spar 4.
  • the member 20 is similarly mounted on the other spar 3.
  • Rack and pinion gears are provided as adjustable drives.
  • the pinions 22 and 23 of each rack and pinion are rotatable about a common shaft 24 rotatably mounted in both side spars 3,4 of the back rest.
  • the shaft 24 is rotatable by means of a grip 25.
  • each pinion 20 or 23 engages a toothed rack 26,27 which is provided in a longitudinal slit 28,29 of each slide member 20 or 21.
  • the eccentric 16 is actuated by means of the handle 14, and thus rotated.
  • the working surface 16a of the eccentric 16 as a result of its engagement with the abutment 17, effects a pivoting of the U-shaped harness and thereby of the lumbar support 6, so that in this area the underspringing 1,2 bulges out forwardly.
  • the underspringing 1,2 moreover ensures the continued engagement of the operative surface 16a of the eccentric 16 with the abutment 17.
  • Two springs loops are rigidly suspended on each side of the strap so that the springs and strap under load cannot rotate away from the underspringing. Therefore on pivoting of the lumbar support only the degree of curvature of the back rest is modified. By maintaining the spring constant the springing comfort of the back rest is not affected.
  • the described seat provides a constructionally simple lumber support which is reliable and sensitive in operation and which evenly distributes the pressure on the back rest underspringing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
US06/584,108 1983-02-28 1984-02-27 Seat with lumbar support Expired - Fee Related US4623193A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3306994 1983-02-28
DE19833306994 DE3306994A1 (de) 1983-02-28 1983-02-28 Sitz, insbesondere kraftfahrzeugsitz

Publications (1)

Publication Number Publication Date
US4623193A true US4623193A (en) 1986-11-18

Family

ID=6192061

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/584,108 Expired - Fee Related US4623193A (en) 1983-02-28 1984-02-27 Seat with lumbar support

Country Status (13)

Country Link
US (1) US4623193A (pt)
JP (1) JPS59199336A (pt)
BE (1) BE899003A (pt)
BR (1) BR8400853A (pt)
DE (1) DE3306994A1 (pt)
ES (1) ES286094Y (pt)
FR (1) FR2541567B1 (pt)
GB (1) GB2135873B (pt)
IT (1) IT1181521B (pt)
MX (1) MX156992A (pt)
SE (1) SE8401069L (pt)
YU (1) YU43342B (pt)
ZA (1) ZA841424B (pt)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725095A (en) * 1986-07-11 1988-02-16 Johnson Service Company Vehicle seat with mechanical lumbar support having two degrees of freedom
US4886316A (en) * 1987-06-30 1989-12-12 Tachi-S Co., Ltd. Lumbar support device
US4950032A (en) * 1989-03-31 1990-08-21 Shiroki Corporation Seat having vertically movable lumber support
US5013087A (en) * 1989-03-31 1991-05-07 Shiroki Corporation Seat having adjustable lumbar support
US5087098A (en) * 1990-09-25 1992-02-11 Tachi-S Co., Ltd. Lumbar support device
US5102195A (en) * 1988-09-15 1992-04-07 Pin Dot Products Seating system
US5516195A (en) * 1993-12-28 1996-05-14 Bertrand Faure France Adjustable seat frameworks and to seats equipped with such frameworks
US20070108816A1 (en) * 2005-11-17 2007-05-17 Lear Corporation Self adjusting seatback system
US9332851B2 (en) 2013-03-15 2016-05-10 Hni Technologies Inc. Chair with activated back flex
US9504331B2 (en) 2007-03-13 2016-11-29 Hni Technologies Inc. Dynamic chair back lumbar support system
USD796883S1 (en) 2014-10-15 2017-09-12 Hni Technologies Inc. Chair
US9801470B2 (en) 2014-10-15 2017-10-31 Hni Technologies Inc. Molded chair with integrated support and method of making same
US10064493B2 (en) 2014-04-17 2018-09-04 Hni Technologies Inc. Flex lumbar support
US10927545B2 (en) 2010-05-05 2021-02-23 Allsteel Inc. Modular wall system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59137151U (ja) * 1983-03-03 1984-09-13 アイシン精機株式会社 ランバ−サポ−ト
IT1257058B (it) * 1992-07-27 1996-01-05 Fiat Auto Spa Elemento di sopporto dorsale persedili, particolarmente sedili automobilistici.
ES2340658B1 (es) * 2010-03-24 2011-05-24 Alejandro Gomez Rubio "dispositivo auxiliar para el mantenimiento de la lordosis cervical fisiologica u reposacabezas que comprende dicho dispositivo.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL285617A (pt) *
US3258259A (en) * 1964-07-14 1966-06-28 Volvo Ab Seat backrest with tensioning means
US3887232A (en) * 1973-06-06 1975-06-03 Brose & Co Metallwerk Max Hinge arrangement for a folding car seat
SU640877A1 (ru) * 1976-01-07 1979-01-08 Предприятие П/Я А-3495 Механизм регулировки профил спинки сидень транспортного средства
US4154477A (en) * 1978-03-20 1979-05-15 Milsco Manufacturing Company Vehicle seat having backrest height adjustment means
US4296965A (en) * 1978-07-31 1981-10-27 Nissan Motor Company, Limited Seat with adjustable lumbar supporter
US4449751A (en) * 1981-05-26 1984-05-22 Lear Siegler, Inc. Seat backrest having an adjustable lumbar support
US4469374A (en) * 1981-11-20 1984-09-04 Namba Press Works Co., Ltd. Automotive seat

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB869684A (en) * 1958-02-24 1961-06-07 Poul Frederik Wiberg Joergense Improvements in or relating to backs for armchairs and like pieces of furniture
GB1199756A (en) * 1967-08-10 1970-07-22 Nat Res Dev Seats
FR2087510A5 (pt) * 1970-05-21 1971-12-31 Citroen Sa
GB1536132A (en) * 1976-04-15 1978-12-20 Pullman Flexolators Ltd Seats
US4155592A (en) * 1977-08-07 1979-05-22 Nissan Motor Co., Ltd. Seat back with adjustable lumbar supporter
JPS54110063A (en) * 1978-02-17 1979-08-29 Nhk Spring Co Ltd Seat for vehicle
US4181357A (en) * 1978-03-20 1980-01-01 Milsco Manufacturing Company Seat backrest tilt and height adjustment means
FR2432854A1 (fr) * 1978-08-09 1980-03-07 Stora Philippe Fauteuil de repos pour usagers de tailles et carrures variables
US4239282A (en) * 1978-12-18 1980-12-16 The Boeing Company Pilot seat
US4182533A (en) * 1978-12-26 1980-01-08 Uop Inc. Seat backrest having an adjustable lumbar support
JPS55160521A (en) * 1979-05-31 1980-12-13 Nissan Motor Seat equipped with vertebrae lumbales support apparatus
DE8203540U1 (de) * 1982-02-10 1982-05-13 Backsmann, Peter, 5000 Köln Rueckenstuetze, insbesondere fuer kraftfahrzeugsitze

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL285617A (pt) *
US3258259A (en) * 1964-07-14 1966-06-28 Volvo Ab Seat backrest with tensioning means
US3887232A (en) * 1973-06-06 1975-06-03 Brose & Co Metallwerk Max Hinge arrangement for a folding car seat
SU640877A1 (ru) * 1976-01-07 1979-01-08 Предприятие П/Я А-3495 Механизм регулировки профил спинки сидень транспортного средства
US4154477A (en) * 1978-03-20 1979-05-15 Milsco Manufacturing Company Vehicle seat having backrest height adjustment means
US4296965A (en) * 1978-07-31 1981-10-27 Nissan Motor Company, Limited Seat with adjustable lumbar supporter
US4449751A (en) * 1981-05-26 1984-05-22 Lear Siegler, Inc. Seat backrest having an adjustable lumbar support
US4469374A (en) * 1981-11-20 1984-09-04 Namba Press Works Co., Ltd. Automotive seat

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725095A (en) * 1986-07-11 1988-02-16 Johnson Service Company Vehicle seat with mechanical lumbar support having two degrees of freedom
US4886316A (en) * 1987-06-30 1989-12-12 Tachi-S Co., Ltd. Lumbar support device
US5102195A (en) * 1988-09-15 1992-04-07 Pin Dot Products Seating system
US4950032A (en) * 1989-03-31 1990-08-21 Shiroki Corporation Seat having vertically movable lumber support
US5013087A (en) * 1989-03-31 1991-05-07 Shiroki Corporation Seat having adjustable lumbar support
US5087098A (en) * 1990-09-25 1992-02-11 Tachi-S Co., Ltd. Lumbar support device
US5516195A (en) * 1993-12-28 1996-05-14 Bertrand Faure France Adjustable seat frameworks and to seats equipped with such frameworks
US7393054B2 (en) 2005-11-17 2008-07-01 Lear Corporation Self adjusting seatback system
US20070108816A1 (en) * 2005-11-17 2007-05-17 Lear Corporation Self adjusting seatback system
US9504331B2 (en) 2007-03-13 2016-11-29 Hni Technologies Inc. Dynamic chair back lumbar support system
US10927545B2 (en) 2010-05-05 2021-02-23 Allsteel Inc. Modular wall system
US11725382B2 (en) 2010-05-05 2023-08-15 Allsteel Inc. Modular wall system
US9332851B2 (en) 2013-03-15 2016-05-10 Hni Technologies Inc. Chair with activated back flex
US10172465B2 (en) 2013-03-15 2019-01-08 Hni Technologies Inc. Chair with activated back flex
US10893752B2 (en) 2013-03-15 2021-01-19 Hni Technologies Inc. Chair with activated back flex
US10064493B2 (en) 2014-04-17 2018-09-04 Hni Technologies Inc. Flex lumbar support
USD796883S1 (en) 2014-10-15 2017-09-12 Hni Technologies Inc. Chair
US9801470B2 (en) 2014-10-15 2017-10-31 Hni Technologies Inc. Molded chair with integrated support and method of making same
USD833193S1 (en) 2014-10-15 2018-11-13 Artco-Bell Corporation Chair

Also Published As

Publication number Publication date
MX156992A (es) 1988-10-18
GB2135873A (en) 1984-09-12
IT8485534A0 (it) 1984-02-24
JPS59199336A (ja) 1984-11-12
FR2541567A1 (fr) 1984-08-31
FR2541567B1 (fr) 1988-08-26
SE8401069L (sv) 1984-08-29
GB8405046D0 (en) 1984-04-04
ES286094Y (es) 1986-06-01
YU29584A (en) 1988-04-30
IT1181521B (it) 1987-09-30
ZA841424B (en) 1984-10-31
SE8401069D0 (sv) 1984-02-27
BE899003A (fr) 1984-06-18
JPH0233247B2 (pt) 1990-07-26
DE3306994A1 (de) 1984-08-30
BR8400853A (pt) 1984-10-02
GB2135873B (en) 1986-08-13
YU43342B (en) 1989-06-30
ES286094U (es) 1985-11-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: P.A. RENTROP HUBBERT & WAGNER FAHRZEUGAUSSTATTUNGE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LIEKER, REINER;REEL/FRAME:004240/0337

Effective date: 19840217

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19941123

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362